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WorksheetsEnvirochemistry Review #2
Total questions: 74
Worksheet time: 1hrs 14mins
Which is the smallest amount of a pollutant?
1 ppm (parts per million)
1 ppb (parts per billion)
1 ppt (parts per trillion)
1 part per thousand
What is the concentration of a solution in parts per million if 0.02 grams of NaCl is dissolved in 1000 grams of water?
2 ppm
20 ppm
200 pm
0.2 ppm
Which of the following concentrations is higher?
0.2 ppm
2.2 ppm
20.2 ppm
200 ppm
What is the concentration of solution (in ppm) made up of 0.005 grams of solute in 350 grams of solution?
14.3 ppm
12.1 ppm
1.4 ppm
9.8 ppm
Which is the highest concentration of lead?
5 ppm
0.5 ppm
5 ppb
0.5 ppb
How do scientists determine the toxicity of a chemical?
LD50 is measured by testing toxins on humans
What is more dangerous? An LD50 of ...
0.04 ppm
1.29 ppm
1.04 ppm
0.40 ppm
Lethal dose (LD50) values are determined by the amount of a substance that:
kills at least 50 individuals of the test population exposed to the substance
kills a test population when given at least 50 ml of the substance
kills at least 50% of the test population exposed to the substance
kills a test population when given at least 50g of the substance
What is the LD50 for the toxin tested in this experiment?
6
12.5
25
50
100
Arrange the following chemicals from most to least toxic: dioxin, nicotine, botulinum toxin A, dieldren.
Dieldren, dioxin, nicotine, botulinum toxin A
Dieldren, nicotine, dioxin, botulinum toxin A
Botulinum toxin A, nicotine, dioxin, dieldren
Botulinum toxin A, dioxin, nicotine, dieldren
What is the best estimate for the LD50 of the toxin in this graph?
3.5
5
3.7
100
Which substance is least toxic?
chlorine (LD50 = 850 mg/kg)
aspirin (LD50 = 200 mg/kg)
cola (LD50 = 140 mg/kg)
vitamin A (LD50 = 30 g/kg)
Arsenic has an LD50 of 15mg/kg. How many mg of arsenic is toxic to an individual who weighs 100 kg?
15 mg
1,500 mg
6.7 mg
0.15 mg
which one of the following terms describes the image
acidity
turbidity
nitrates
temperature
Which of the rivers has the best water quality?
Kissimmee river
peace river
tamiami river
As acidity increases,
water quality increases
water quality decreases
water quality does not change
pH paper
How does increasing nitrates impact stream health?
∎19 leeches
∎7 freshwater worms
∎8 midge larvae
∎15 mosquito larvae
What can you determine about the health of the stream?
If there is a large variety of living organisms in and around a water supply, then could the water supply be considered healthy?
No, because it contains nitrates.
No, because it contains living organisms.
Yes, because it contains bioindicators, which are used to assess the health of a water supply.
Yes, because it contains nitrates, which are used to assess the health of a water supply.
What two factors directly lead to unhealthy levels of nitrates in the water?
Fertilizer Runoff
Animal Waste Runoff
burning fossil fuels
Acid rain
Below is a chart of test results from water samples taken at various sites. Which of the following best describes the results from these sites?
Site 1 is unhealthy because of its dissolved oxygen levels are too high.
Site 3 and 4 are unhealthy because the temperature is too low.
Site 2 is unhealthy because the pH is too high and the temperature is too low.
Site 5 is unhealthy because the temperature is too high and the dissolved oxygen is too low.
Which of the following can be concluded based on the data?
Sites 5 through 8 are most healthy because they have a high % of bioindicators.
Sites 1 and 13 are most concerning because they have low % of bioindicators.
Sites 5 through 8 are most concerning because they have a high % of bioindicators.
Site 12 is most healthy because it has the lowest % of bioindicators.
Which beaker in the image has the highest turbidity?
A
B
C
D
Which is a true statement of the diagram above?
As temperature increases dissolved oxygen increases
As temperature decreases dissolved oxygen decreases
As temperature increases dissolved oxygen decreases
Noe of the above
Which picture shows water pollution caused by fertilizer run-off?
Algal blooms can occur when untreated sewage ends up in freshwater systems like rivers and lakes. Biological waste, which is found in sewage may contain the following: (Select TWO that apply)
Argon
Oxygen
Nitrogen
Phosphorus
The rapid growth of algae, called an algae bloom, can lead to the formation of dead zones that cannot sustain aquatic life. This is mainly because the algae bloom lowers the amount of...
chemical pollutants
dissolved oxygen
freshwater runoff
nutrients
______________ ______________ is produced when fuels containing sulfur are burned in the presence of oxygen.
Carbon dioxide
Sulfur dioxide
Carbon monoxide
Greenhouse gas
Source of carbon monoxide
Incomplete combustion of fossil fuels
Combustion of fossil fuels
Decomposition of plant and animal matters
Photochemical reaction of CO2
What is the main cause of air pollution?
plowing fields and releasing dust
using solar power
burning fossil fuels
using water power
Most scientists agree that Global warming/climate change is due to
Which pair below are the two main sources of air pollution in urban (populated) areas?
vehicles, volcanoes
vehicles, industries
Industries, agriculture
All of the above
Plastic bottle is example of _________________
Biodegradable
Non-Biodegradable
Peel of fruits and vegetables is example of _________________
Biodegradable
Non-Biodegradable
Biodegrade means...?
the process of creating algae based plastics
constructed by using biological materials like algae
able to be broken down by microbes in nature
able to be turned into vitrimirs
Which method uses natural or genetically engineered plants to absorb, filter, and remove contaminants from soil and water?
physical methods
nanomagnets
phytoremediation
chemical methoda
Which of the following would increase the rate of biodegradation?
increase temperature
decrease temperature
remove bacteria
remove nutrients
Which of the following would decrease concentration of pollutants?
dilution
deposition
biomagnification
inhalation
One way to reduce pollution from coal burning plants is to install...
cooling systems.
air filters.
smokestack scrubbers.
Sanitary landfills have __________ to prevent leachate from getting into groundwater.
liners
daily layers of soil
garbage
clay soils beneath landfill
What is bio-remediation?
Process where organic things are used to break down pollution
When you use biology to meditate
When you amend biological things
Process where you watch bacteria break things down
What can NOT be added into the compost bin ?
soiled napkins
egg shells
expired medicine and glass items
Fruit scraps
Which of the following technologies uses light to break down materials such as plastics?
biodegradation
phytoremediation
biomagnification
photolysis
What is the manipulated variable in this experiment?
dissolved oxygen
mg/liter
oxygen solubility in water at various temperatures
temperature
What is the responding variable in this experiment?
Location of test
Water Quality
Which statement is expressing an economic perspective?
How expensive is it to clean up the chemical pollution?
Which is more important, people's wants or wildlife's needs?
Are laws and regulations in place that prevent dumping?
What is causing this algae to form on the lake?
Which statement is expressing an ethical perspective?
How expensive is it to clean up the chemical pollution?
Which is more important, people's wants or wildlife's needs?
Are laws and regulations in place that prevent dumping?
What is causing this algae to form on the lake?
Which activity shown in the map is a main cause of algae blooms?
Waste water (sewage) pipes from the village leading to the river.
Emissions from the sawmill and trucks
Oxygen gas from photosynthetic plants
Fumes from the chimney of the factory.
Select all the likely causes of acid rain from the illustration
automobile exhaust
factory exhaust
pesticides
fertilizers
animal waste
Select all the likely causes of heavy metal contamination from the illustration
landfill
hazardous waste dumpsite
leaking underground storage tank
fertilizers
animal waste
Select all the likely causes of algae blooms from the illustration
automobile exhaust
factory exhaust
pesticides
fertilizers
animal waste
What is the effect that the lumber clear cut zone is having on the water quality downstream?
increasing water quality
decreasing water quality
no effect on water quality
What is the effect of the water filtration plant on the water quality downstream?
increasing water quality
decreasing water quality
no effect on water quality
At which 2 test sites would you most likely find algae bloom?
A and D
B and D
C and D
B and C
At which test site(s) would you most likely many mayfly and stonefly larvae?
A
B
C
D
At which site are you most likely to find a low pH?
1
2
3
4
At which site are you most likely to find an algae bloom?
1
2
3
4
At which site will you most likely find high dissolved oxygen?
1
2
3
4
At which site will you most likely find low dissolved oxygen?
1
2
3
4
